oliviakushner5 oliviakushner5
  • 16-02-2021
  • Mathematics
contestada

-x^2+2x-9=0 find the discriminant

Respuesta :

jimrgrant1 jimrgrant1
  • 16-02-2021

Answer:

- 32

Step-by-step explanation:

Given a quadratic equation in standard form, ax² + bx + c = 0 ( a ≠ 0 ), then

the discriminant is

Δ = b² - 4ac

- x² + 2x - 9 = 0 ← is in standard form

with a = - 1, b = 2, c = - 9 , so

b² - 4ac

= 2² - (4 × - 1 × - 9)

= 4 - (36)

= - 32

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